Put something like this on your user page:
{{User advogato-1|minorityreport}}
Replace minorityreport by your own username. advogato-0 is observer, advogato-1 is apprentice, advogato-2 is journeyer, advogato-3 is master. If you want to be coy, use advogato without any number, and we'll just have to tramp on over to Advogato to tell your certification level.
Whether or not you use them, please feel free to say hello at my Wikipedia talk page.
FOAF updates: Trust rankings are now exported, making the data available to other users and websites. An external FOAF URI has been added, allowing users to link to an additional FOAF file.
Keep up with the latest Advogato features by reading the Advogato status blog.
If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!